Patent GB-834696-A (GB)
Title: Single station book pressing and creasing machine
IPC: B42C13/00
Filed: 1957-07-16
Abstract: 834,696. Book pressing and creasing machines. CRAWLEY BOOK MACHINERY CO. Inc. July 16, 1957 [Dec. 3, 1956], No. 22487/57. Class 16 A book pressing and creasing machine includes a frame, a presser frame, a platen and presser plate with power means for .shifting the plate towards the platen to press a book disposed therebetween, a creaser frame and two creaser jaws with power means for shifting the jaws toward one another to crease the edge of a book engaged between the platen and presser plate and shiftable control means energizing the first power means for pressing the book and thereafter energizing the second power means for creasing the edge of the book, the first power means comprising a presser cylinder connected to the platen and piston connected to the presser plate, the second power means comprising a creaser cylinder connected to one jaw and piston connected to the other jaw, a fluid pressure system communicating with the presser cylinder and including the control means which directs fluid pressure to the presser cylinder to hold the book firmly in position and pressure responsive means responsive to the pressure imposed on the book and communicating with the creaser cylinder to direct fluid pressure thereto to force the creaser jaws into pressure engagement after a predetermined pressure has been imposed on the book. The machine frame or housing 10 comprises a front wall 11 with control panel 12 and top panel 13, reinforced at 20, carrying the presser and creaser mechanisms. The stationary platen 15 mounted on panel 13 comprises a thick metal slab to the underside of which is secured the presser cylinder 17. The upper presser plate 16 is connected by presser frame 18 to the piston 36 of cylinder 17, the frame 18 including four cylindrical tension rods 45 passing through guide bushings in the platen 15 and secured by taper pins to the corners of plate 16 and to an actuating plate 38 to which the lower end of piston rod 37 is secured by a nut 40. The cylinder 17 is positioned towards the front of the platen 15 since greater pressure is necessary towards the bound edge 53 and to allow for books 51, 52 of less area than the plates. The creaser jaw 22 is mounted floatingly at the forward edge of platen 15 and the upper jaw 23 is carried by a frame 24 to lie against the forward edge of plate 16, the frame 24 including a pair of square tension bars 68 secured to the ends of jaw 23 by keys 71 and horizontal screws 72 and similarly to a cross bar 77. The bars 68 are slidably secured by bearing blocks 73, 74, 75 to the plates 16, 15 and 38 of the presser frame and the floating lower jaw 22 is guided by keys 65 (Fig. 6) engaged in keyways 67 in the bars 68. The creaser jaw 22 is yieldably mounted in an upper cross bar 56 supported by angle irons 57 secured to the side walls of housing 10 by means of compression springs 60 in bores in the jaw and bar and hold down screws 63 through the springs 60, the heads 64 of the screws engaging the under surface of bar 56 and adjusted to hold the jaw 22 level, with its working edge 55 parallel to and just above the receiving edge 50 of platen 15. The creaser cylinder 25 and piston 82 are supported in the frame 24, a compression rod 83 connected to the head of the cylinder 25 passing through an opening in cross bar 56 and being suspended therefrom by a screw 86 which lies in a slot 85 to allow limited upward movement of the frame 24. The upper end 87 of the rod 83 is rounded to engage a conical recess 88 in the centre of the lower surface of jaw 22. The frame 24 is lowered to bring the upper jaw 23 into clamping engagement with the book 51-53 by a treadle 26 secured to the cross bar 77 which is normally held in its upper position by tension springs 90 between the bar and the presser frame 18. The crossbar 77 is joined to the piston rod 78, the creaser cylinder 25 by a latch 93 thereon sliding in a sleeve 94 welded to the cross bar 77 to allow the downward movement of the frame 24. The treadle 26 is pivoted at 101 to the cross-bar 77 and includes a cam surface 102, a latch finger 103 which passes through a slot 104 in sleeve 94 to engage a groove 96 in the plunger 93 and a notch 105 to fit the head 106 of the plunger, a compression spring 107 normally holding these parts in engagement. Fluid from an hydraulic pump 30 supported at 31 over a reservoir 32 is passed to presser cylinder 17 through conduits 41, 42 and then to creaser cylinder 25 through conduits 80, 81, the pistons 36, 82 normally being held in the upper position. The operator first positions the book on the platen 15, lowers the treadle 26 and jaw 23 to clamp the edge of the book and then presses a start button 28 to initiate the cycle in which the platen 16 is lowered by fluid through conduit 41 to cylinder 17 and, When a Predetermined pressure is reached, jaw 23 is lowered and jaw 22 raised by fluid through conduit 80 to cylinder 25, the piston 78 pressing down the plunger 93 until the head 106 engages the cross-bar 77, when the operator can release the treadle 26 and the latch 103 and notch 105 will re-engage the groove 96 and head 106. If the treadle has been released before the fluid reaches cylinder 25, the head 106 first engages the cam surface 102 to move the latch arm outwardly. The creaser frame 24 may be latched in its upper position by a pair of detent devices 112 having a spring-pressed ball 116 to engage a recess 118 in each tension bar 68. Both the presser plates 16, 16 and the creaser jaws 22, 23 may be provided with electrical heating elements 163, 164 and 165, 166 to assist the drying out of the liquid adhesive used to secure the cover 52 to the filler 51, the temperature, pressur and dwell period being regulated according to the thickness of the covers and such like variables by rheostats 171, control valves 127, 141, 147 and time delay relay TR, respectively.